/*
 * Syncrem - Tool for remote synchronizing
 *
 * Copyright (c) 2011 Norbert Chromek <norbert.chromek@gmail.com>
 *
 * Syncrem is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Syncrem is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Syncrem. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FILELOCK_H
#define FILELOCK_H

#include <string>

/**
 * This class provides controling of lock file.
 */

class FileLock {

	// public type definitions
	public:
		enum LockStatus {
			Unlocked,
			Locked,
			Error,
		};

	// public functions
	public:
		FileLock();
		~FileLock();

		bool lock();
		void setMain(bool isMain);
		FileLock::LockStatus status();

	// private functions
	private:
		void checkLock();
		void closeLock();
		void openLock();

	// private variables
	private:
		bool isMain_;
		LockStatus status_;
		int lockFile_;

	// private constants
	private:
		static const std::string LOCK_PATH;
		static const std::string LOCK_FILE;
};

#endif // FILELOCK_H
